Table 1.
MOS Sensor Array of PEN2 and their main application.
| No. in array | Sensor name | Description | Reference |
|---|---|---|---|
| 1 | W1A-aromatic | Aromatic compound | Toluene, 10 mg/kg |
| 2 | W5B-broadrange | Broad range sensitivity reacts to nitrogen oxides and ozone very sensitive with negative signal | NO2, 10 mg/kg |
| 3 | W3A-aromatic | Ammonia, used as sensor for aromatic compounds | Benzene, 10 mg/kg |
| 4 | W6B-hydrogen | Mainly hydrogen, selectively (breath gases) | H2, 100 mg/kg |
| 5 | W5A-arom-aliph | Alkanes, aromatic compounds, less polar compounds | Propane, 1 mg/kg |
| 6 | W1B-broad-methane | Sensitive to methane (environment) ca. 10 mg/kg Broad range, similar to No. 8 | CH4, 100 mg/kg |
| 7 | W1C-sulphur-organic | Reacts on sulphur compounds H2S 0.1 mg/kg. Otherwise sensitive to many terpenes and sulphur organic compounds, which are important for smell, limonene, pyrazine. | H2S, 1 mg/kg |
| 8 | W2B-broad-alcohol | Detects alcohols, partially aromatic compounds, broad range | CO, 100 mg/kg |
| 9 | W2C-sulphur-chlor | Aromatics compounds, sulphur organic compounds | H2S, 1 mg/kg |
| 10 | W3B-methane-aliph | Reacts on high concentrations >100 mg/kg, sometimes very selective (methane) | CH4, 10 mg/kg |